implement join/quit and channel messages properly

irc/net.go

@@ -20,9 +20,12 @@ func StringReadChan(conn net.Conn) <-chan string {
 	ch := make(chan string)
 	reader := bufio.NewReader(conn)
 	go func() {
+		defer conn.Close()
+		defer close(ch)
 		for {
 			line, err := readTrimmedLine(reader)
 			if err != nil {
+				log.Print("net: ", err)
 				break
 			}
 			if DEBUG_NET {
@@ -30,7 +33,6 @@ func StringReadChan(conn net.Conn) <-chan string {
 			}
 			ch <- line
 		}
-		close(ch)
 	}()
 	return ch
 }
@@ -39,18 +41,19 @@ func StringWriteChan(conn net.Conn) chan<- string {
 	ch := make(chan string)
 	writer := bufio.NewWriter(conn)
 	go func() {
+		defer conn.Close()
+		defer close(ch)
 		for str := range ch {
 			if DEBUG_NET {
 				log.Printf("%s ← %s : %s", conn.RemoteAddr(), conn.LocalAddr(), str)
 			}
 			if _, err := writer.WriteString(str + "\r\n"); err != nil {
+				log.Print("net: ", err)
 				break
 			}
 			writer.Flush()
 		}
-		close(ch)
 	}()
-
 	return ch
 }